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mem: Align cache timing to clock edges

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This patch changes the cache timing calculations such that the results
are aligned to clock edges.

Plenty stats change as a results of this patch.
This commit is contained in:
Andreas Hansson 2013-06-27 05:49:49 -04:00
parent 10650fc525
commit 33a8d777ad
1 changed files with 5 additions and 5 deletions
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10
src/mem/cache/cache_impl.hh vendored
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@ -929,7 +929,7 @@ Cache<TagStore>::recvTimingResp(PacketPtr pkt)
// responseLatency is the latency of the return path
// from lower level caches/memory to an upper level cache or
// the core.
completion_time = curTick() + responseLatency * clockPeriod() +
completion_time = clockEdge(responseLatency) +
(transfer_offset ? pkt->busLastWordDelay :
pkt->busFirstWordDelay);
@ -946,14 +946,14 @@ Cache<TagStore>::recvTimingResp(PacketPtr pkt)
// responseLatency is the latency of the return path
// from lower level caches/memory to an upper level cache or
// the core.
completion_time = curTick() + responseLatency * clockPeriod() +
completion_time = clockEdge(responseLatency) +
pkt->busLastWordDelay;
target->pkt->req->setExtraData(0);
} else {
// not a cache fill, just forwarding response
// responseLatency is the latency of the return path
// from lower level cahces/memory to the core.
completion_time = curTick() + responseLatency * clockPeriod() +
completion_time = clockEdge(responseLatency) +
pkt->busLastWordDelay;
if (pkt->isRead() && !is_error) {
target->pkt->setData(pkt->getPtr<uint8_t>());
@ -1021,7 +1021,7 @@ Cache<TagStore>::recvTimingResp(PacketPtr pkt)
}
mq = mshr->queue;
mq->markPending(mshr);
requestMemSideBus((RequestCause)mq->index, curTick() +
requestMemSideBus((RequestCause)mq->index, clockEdge() +
pkt->busLastWordDelay);
} else {
mq->deallocate(mshr);
@ -1257,7 +1257,7 @@ Cache<TagStore>::handleFill(PacketPtr pkt, BlkType *blk,
std::memcpy(blk->data, pkt->getPtr<uint8_t>(), blkSize);
}
blk->whenReady = curTick() + responseLatency * clockPeriod() +
blk->whenReady = clockEdge() + responseLatency * clockPeriod() +
pkt->busLastWordDelay;
return blk;